diff --git a/unit_tests/partitioner/bisection_to_partition.cpp b/unit_tests/partitioner/bisection_to_partition.cpp
index 28cd8aac7..cbc5a3261 100644
--- a/unit_tests/partitioner/bisection_to_partition.cpp
+++ b/unit_tests/partitioner/bisection_to_partition.cpp
@@ -3,7 +3,7 @@
 
 #include "partitioner/bisection_to_partition.hpp"
 
-#define CHECK_SIZE_RANGE(range, ref) BOOST_CHECK_EQUAL(range.end() - range.begin(), ref)
+#define CHECK_SIZE_RANGE(range, ref) BOOST_CHECK_EQUAL((range).end() - (range).begin(), ref)
 #define CHECK_EQUAL_RANGE(range, ref)                                                              \
     do                                                                                             \
     {                                                                                              \
diff --git a/unit_tests/partitioner/remove_unconnected.cpp b/unit_tests/partitioner/remove_unconnected.cpp
index b6fd17d40..11d89b19a 100644
--- a/unit_tests/partitioner/remove_unconnected.cpp
+++ b/unit_tests/partitioner/remove_unconnected.cpp
@@ -5,7 +5,7 @@
 
 #include "util/static_graph.hpp"
 
-#define CHECK_SIZE_RANGE(range, ref) BOOST_CHECK_EQUAL(range.end() - range.begin(), ref)
+#define CHECK_SIZE_RANGE(range, ref) BOOST_CHECK_EQUAL((range).end() - (range).begin(), ref)
 #define CHECK_EQUAL_RANGE(range, ref)                                                              \
     do                                                                                             \
     {                                                                                              \